Type material (material%eg ...)

Type(NODEMATERIAL) :: material is for saving each node's material variables. There are many material parameters saved in the Type "material"

 material%dope(i)   ! The doping density of node i   (unit cm^-3)
 material%ea(i)     ! The activation energy of node i  (unit:eV)
 material%Eg(i)     ! The node's bandgap (unit eV)
 material%impurity(i)    ! The node's impurity or fixed charge density 
 material%charges(i)     ! The addition node's fixed charge density. It is similar to impurity
 material%ep(i)     ! The node's dielectric connstant. The unit is cgs unit. So if the dielectric constant is $12 \epsilon_{0}$, you need to put $12\times 8.854\times 10^{-14}$
 material%polx(i)    ! The spontaneous and piezo-electric polarization value along x direction. 
 material%poly(i)    ! The spontaneous and piezo-electric polarization value along y direction. 
 material%polz(i)     ! The spontaneous and piezo-electric polarization value along z direction. The unit is ( $cm ^{-2}$ ). For example, if the polarization is $0.03 C/m^{2}$, you need to put $0.03\times 6.25\times 10^{14}$
 material%efmass(1,i)  ! Effective mass of electron in parallel direciton (x & y) (unit $m_{0}$)
 material%efmass(2,i)    ! effective mass of electron in perpendicular direction (z) (unit $m_{0}$)
 material%efmass(3,i)     ! effective mass of heavy hole  (unit $m_{0}$)
 material%efmass(4,i)   ! effective mass of light hole (unit $m_{0}$)
 material%trapNT(i)     ! Trap density  (unit $cm^{-2}$)
 material%trapEt(i)      ! Trap levels
 material%trapdegenercy(i)  ! Trap degenercy
 material%traptaun(i)   !  electron trap lifetime
 material%traptaup(i)    ! hole trap lifetime
 material%taun(i)     ! nonradiative lifetime of electrons
 material%taup(i)     ! nonradiative lifetime of holes

IF the material's parameter ended with El, such as EgEl, it means the material parameters of each small tetrahedron elements. Note that each tetrahedron element is constructed by 4 nodes. A node may be the neighbor of many different tetrahedron.

 material%EgEl(j)    ! The element's bandgap (unit eV)
 material%polxEl(j)    ! The spontaneous and piezo-electric polarization value along x direction of jth element. 
 material%polyEl(j)    ! The spontaneous and piezo-electric polarization value along y direction of jth element.. 
 material%polzEl(j)    ! The spontaneous and piezo-electric polarization value along z direction of jth element..